16 Nov
2017
16 Nov
'17
10:59 a.m.
On Thu, Nov 16, 2017 at 10:48 AM, Douglas Taylor via cctech <
cctech at classiccmp.org> wrote:
I have a couple of LK401 keyboards and they generate a
'keyboard error -
4' error on power up test when attached to a VT420. The problem seems to
be one or more keys that are 'stuck on'.
When the keyboard is turned upside down and shaken I can get the self test
to pass.
Is it possible to open the keyboards and repair this type of problem?
I also have LK411 keyboards that have a PS/2 type of connector, is there
an adapter to let me use these keyboards instead of the LK401s? Are the
signals the same, only the connectors being different?
Doug
Try this?
http://microvax2.org/wp/2017/05/24/lk402-aa-keyboard-fix/
If this is like your keyboard, you can use a product called Keypad-fix